Mowing-machine.



Patented Oct. 3|, |899.

No. samen'.

W. H. WILLIAMS. MOWING MACHINE. .(Application 4filed Nov. 28, 1898.)

I(No Model.)

NITED STATI-3s- PATENT FFICE.

VILLIAM I-I. WILLIAMS, OF MISHAWAKA, INDIANA.

MOWING-MACHINE.

' SPECIFICATION forming part of Letters Patent No. 636,190, dated October 31, 1899.

Application filed November 2B, 1898. Serial No. 697,621. (No model.)

T0 a/ZZ whom it may concern:

Be it known that I, WILLIAM H. WILLIAMS, a citizen of the United States, residing at Mishawaka, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Mowing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in mowing-machines of the class in which the cutting-line is forward of the drive-wheel, and the peculiar construction and arrangement of parts of my invention are especially adapted for lawn-mowers.

The especial objects of my improvements are to dispense with crank-arms, pitman-rods, and other parts which add to the expense, increase the weight and friction, and render many of the machines commonly employed liable to get out of order.

A further object is to protect the driving parts of the machine from dirt, grass, sticks, dac., and to so distribute the power that-the cutting-knives will be equally and uniformly driven and supported with the minimum amount of friction.

Having these objects to subserve, I construct a lawn-mower as shown in the accompanying drawings, forming a part of this application, in which- Figurelisatop or plan view of my machine. Fig. 2 is a longitudinal sectional view. Fig. 3 is a vertical sectional view on the line fr a; of Fig. 2. 1 of the cutting-knives and bed-plate supporting same. Fig. 7 is an enlarged view ot' the friction-roller for reciprocating the knives, and Fig. 8 is an enlarged view of an antifriction-roller for securing and retaining the recprocating'knives in alinement.

Referring to the drawings, A A represent the drive-Wheels, which are keyed or otherwise suitably mounted on an axle or shaft a, which also has loosely mounted thereon circular plates B B, which lit within the flange a' of the wheels A A, as clearly shown in Fig. 2. Rearwardly extendingfrom and suitably secured to the plates B B are arms L, which Figs. 4, 5, and 6 are detail viewsA when bolted at their outer ends to the handle form a y'oke in which is supported a groundroller K. This roller is adjustably mounted in vertically-slotted extensions Z Z of the arms L, and by its adjustment the height of the cnt by the knives is controlled in a manner well known. The arms are preferably braced by a rod h, connecting them at a point between the roller and the drive-wheels.

Bolted to lugs b b, which extend horizontally from the face of the plates B, near their lower edge, is a horizontal rectangular flat bedplate E, near either end of which are bolt-holes e e, in which are secured by nuts vertical pins h', upon which are loosely mounted cylindrical rollers or sleeves H. Superimposed upon the bed-plate E is the lower cutting or knife bar G, having formed therein longitudinal slots g g of suficient width to receive the rollers or sleeves H, the latter constituting antifrictional bearings for said knife-bar in its reciprocating movement. At one side of the upper face of the knife-bar G is a small lug g', set at right angles to the plane of said bar and for a purpose to be explained. Above the knife-bar G is a second or upper cutting or knife bar F, similarly shaped to the bar G and provided with slots ff, which register with the like slots g g in the bar G. The bar F has formed therein a central longitudinal opening f', in which is located a coil-spring D, one end of which is secured to the lng g of the bar G, which passes through one end of the slot f', and the other end of said spring impin ges against the abutting edge of the plate at the opposite end of the slot, so that the normal tendency of the spring is to force the two plates outwardly to the point limited by the length of the slots f and g.

From one corner ofthe bar F, adjacent to the driving-wheel, extends an arm C, in the outer end, of which is mounted a small roller c, and a similar device is secured to and extends from the opposite corner of the bar G. The arms C and rollers c are so disposed that the latter have frictional contact with the annularly-formed cam-faces a2 a2 of the drivewheels A, to attain which they pass through suitable openings b' in the plates B, as shown in Figs. 2 and 3. It will be noted that the cam-face a' is formed on a peripheral shoulder of the wheel, which is covered and protected by the circular plates B.

When the parts are assembled, the rollers c are so set that each rests in a depression in the cam-faces, so that upon the revolution of the drive-wheels both knife-bars will be forced inwardly, overcoming the normal tension of the spiral spring, which tension, however, serves to force the knives into the depressions in the cam-faces.

Having` thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a mowing-machine, the combination of driving-wheels having annular cam-faces on inner peripheral shoulders, cutting-bars having rollers adapted to run on said camfaces, spring D, bed plate E, adjustable WILLIAM I-I. WILLIAMS.

IVitnesses:

LoUIs E. OsBoRN, HUGH A. THOMAS. 

